Specially designed for motorcycle riders to listen to music, with great sound quality and line control to adjust volume and switch songs, it's pretty practical. Features: CSR BT 4.0 chip allows you to wirelessly listen to music with this Hi-Fi headphone. Fashion design, available to be detachable when you want, let music surrounding your life any time. With HD microphone and hands-free function, it can truly free your hands. Built-in 150mAh rechargeable Li-ion battery supplies you with long standby and working time. Sound reminder function, easy to set the device according to sound reminds. Specifications: BT Version: 4.0+EDR BT Name: BT8 Frequency: 2.402GHz-2.480GHz Range: 20-30 meters (depending on devices) Transmission Distance of Microphone: ≤ 1 meter Charging Voltage: 5V Battery: 3.7V/200mAh (402030) Playback Time: ≤ 10 hours Charging Time: ≤ 1 hour Standby Time: ≤ 48 hours Color: Black Item weight: approx. 45g / 1.58oz Package size: approx. 23.3 * 9.8 * 4.7cm / 9.17 * 3.85 * 1.85in Package weight: approx. 108g / 3.80oz Package List: 1 * Earphone 2 * Stickers 1 * User Manual (English)